Stepper exercise device



FIG. 1 is a perspective view of a stepper exercise device showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a top view thereof.

A bottom view thereof is omitted since it does not contain ornamental features. The broken line portions of the stepper exercise device in FIGS. 1-7 represent unclaimed portions of the claimed design and form no part thereof. 

CLAIM The ornamental design for a stepper exercise device, as shown and described. 